SSC CHSL GK Questions 2026

Distance is the length of the actual path and displacement is the straight line from the start to the finish, so on a curved path the two can never be equal: the arc of a circle is always longer than the chord joining its ends.

The centrifugal force has the same magnitude as the centripetal force, which for a body moving in a circle is the mass multiplied by the square of the angular velocity multiplied by the radius.

In uniform circular motion the body covers equal arcs in equal times, so its speed, a scalar, does not change; its kinetic energy and its angular velocity are constant too.

When a body rolls, the surfaces in contact change continuously and the irregularities have no time to interlock deeply, so rolling friction is very much smaller than sliding friction; this single fact is the reason the wheel was invented and the reason a ball bearing is fitted wherever a shaft…

The coefficient of friction is the ratio of the limiting or kinetic frictional force to the normal reaction, and since both are forces the ratio is a pure number; the same reasoning applies to other ratios such as the refractive index and relative density.

Friction is defined as the force that opposes the relative motion, or the tendency of relative motion, between two surfaces in contact; it acts along the surfaces and always against the direction of motion.

Gandhiji regarded Gopal Krishna Gokhale as his political guru, his Rajya Guru. Gandhi first met Gokhale in 1896 and they grew close when Gokhale visited South Africa in 1912.

Biogas is mainly methane and carbon dioxide. Biogas is produced when bacteria break down animal dung, crop waste and kitchen waste in the absence of oxygen, a process called anaerobic digestion.

Goa became the first State in India where every rural household had a functional tap water connection.

Vivekananda began his famous address at Chicago on 11 September 1893 with the words "Sisters and Brothers of America", and the audience rose in a long ovation.

Nerve impulses are carried by the movement of sodium and potassium ions across the membrane of the nerve cell, so sodium is essential.

Salmonella typhi is a rod-shaped bacterium that causes typhoid fever in human beings. Typhoid spreads through food and water contaminated with the faeces of an infected person.

Magnetic field lines are always closed curves, so the statement that they are open curves is the incorrect one. Outside a magnet, field lines run from the north pole to the south pole; inside the magnet they continue from the south pole back to the north pole, closing the loop.

Lipids, including steroids and the phospholipids of membranes, are made by the smooth endoplasmic reticulum, so a defect there would stop lipid synthesis.

The egg is fertilised to form the zygote, the zygote grows into the embryo, and the ovule carrying the embryo becomes the seed.

When light of a suitable frequency falls on a metal and knocks electrons out of it, the process is called photoelectric emission.

Carbon monoxide binds to the haemoglobin of red blood cells to form carboxyhaemoglobin, so the blood can no longer carry oxygen to the tissues.

. Thyroxine sets the body's basal metabolic rate, that is, how fast cells use oxygen and food to release energy.

. When quicklime reacts with water a large amount of heat is released, so the reaction is exothermic.

Papaya bears unisexual flowers: a flower has either stamens or a pistil, and male and female flowers usually grow on separate plants.